Digital video content transmission ciphering and deciphering method and apparatus
A technology for encrypting keys and content, applied in digital transmission systems, synchronous sending/receiving encryption equipment, transmission systems, etc.
Inactive Publication Date: 2005-07-27
INTEL CORP
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AI Technical Summary
Problems solved by technology
However, the availability of this new digital interface brings new challenges—protecting digital video content
While many encryption techniques are known in general, some operational characteristics, such as data capacity, its stream characteristics, bit rate, etc., which usually reside in the source device rather than the sink device, together with the signal location present a unique set of challenges , requiring novel solutions
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[0062] In the following description, various aspects of the invention are described and various details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to those skilled in the art that the invention may be practiced with only some or all of its features, or that the invention may be practiced without regard to the specific details. In other instances, well-known features were omitted or simplified in order not to obscure the invention.
[0063]In the following, the various operations will be described sequentially as discrete steps performed sequentially, in a manner that is very useful for understanding the invention. However, the order of description should not be construed to mean that these operations are necessarily performed in the order in which they are described, or even that the order is dependent. Finally, repeated use of the term "in one embodiment" does not necessarily refer to the same embodiment, althou...
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A video source device provides a basis value to a symmetric ciphering / deciphering process to a video sink device, to which the video source device is to provide a video content. The video source device ciphers the video content for transmission to the video sink device, including generation of a first cipher key through functional transformation of the basis value. The video source device further verifies periodically that the transmitted video content is indeed being symmetrically deciphered by the video sink device. The video sink device practices symmetric deciphering, including generation of a first decipher key through functional transformation of the basis value. The video sink device also provides verification values to the video source device to facilitate confirmation of symmetric deciphering. In one embodiment, the video source and sink devices further authenticate each other, including generation of an authentication key, which is used in the generation of the first cipher / decipher key.
Description
technical field [0001] The present invention relates to the field of content protection. More precisely, the present invention proposes a device for protecting digital video contents to facilitate their secure transmission from a video source device to a video sink device. Background technique [0002] Generally, entertainment, educational, artistic programming, etc. (collectively referred to hereinafter as "content") packaged in digital format provides higher audio and video quality than their analog counterparts. However, it is still difficult for content generators, especially in the entertainment industry, to fully embrace digital formats. The main reason is that digital content is particularly vulnerable to piracy. Unlike the digital format, where each copy of analog content comes with a loss in quality, a pirated copy of digital content is actually as good as a "gold winner". As a result, much effort has been made by the entertainment industry to develop and adopt t...
Claims
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IPC IPC(8): G06F21/00H04L9/08H04L9/20H04L9/32H04N7/167H04N21/258H04N21/41H04N21/4143H04N21/4367H04N21/4627H04N21/6334
CPCG11B20/00086H04N21/4122H04L9/18H04L2209/605H04N21/25816H04K1/00H04N21/63345H04L9/06H04L2209/08G06F2221/2103H04N7/1675H04L9/0637G06F21/445H04L9/065H04N21/4367H04L9/08H04L9/3273H04N21/4627H04N21/4143G06F2221/2107H04L9/12H04L9/0662H04L9/0866H04L2209/60H04N21/6334
Inventor G·L·格劳恩克D·A·李R·W·法伯B·S·特劳
Owner INTEL CORP